Implemt FS#187 -- Show admin history of projects:

When a project is initially created a new mailing list is created,
PROJ-admin@emulab.net.
testbed-approval is subscribed to the list
Several emails that originally went to testbed-approval now go to the
mailing list instead. The From, To, fields are basically the same
with testbed-approval becoming PROJ-admin. This means some mail
is sent with a From PROJ-admin and Bcc the mailing list. Note that
some mail still goes to testbed-approval directly, in particular
ones where there is no clear project involved, and when a project is
denied.
In addition notifications of approval status of new members is also
sent to the list. These emails use to only go to testbed-audit@.
Currently All mail sent to PROJ-admin is also sent to testbed-audit
(via a Bcc). This means that some mail that didn't use to go to
testbed-audit now does.
The mailing list is deleted when a project is deleted with out first
being approved. Becuase of this notified that a project is denied
is sent to testbed-approval instead of PROJ-admin.
Admins can access the mailing list from the Project Profile page.
The mailing list is open in order to allow users to reply to the
mailing list, in addition the check that PROJ-admin is in the To or
CC field is disabled. There is currently no spam control on the
mailing lists. However, since the mailing list address is not posted
anywhere it should't pick up to much spam. If it does we can deal
with it then.
Finally, a new script is created to create the per-project admin
mailing list. See doc/UPDATING.
Also add DBQuerySingleFatal to libdb, which is like DBQueryFatal but
also fails if the query didn't return any results. Basically
identical to he version in libtblog. Eventually libtblog should be
modified to use this version.